I'm the outlier here. Never used non ethanol but have used a few stabilizers in my boat and mower , chainsaws and other lawn maint. tools thru the years. Found quickly Red Stabil didn,t cu. t it When they introduced blue stabil several years ago I started using that and have never had a fuel issue in anything on high test pump gas. I always mix it at storage rate and on lawn tools, chain saws & power washer in particular, it may go 8 months between uses. Many years ago when non ethanol was first introduced I did have a couple fuel related issues on boat motor and 4 wheeler. Was using a product sold by Mercury motors back then (probably 25 years ago at least). It sucked. Made the switch to seafoam then but latter went to blue stabil and use that in everything except the 90 which gets Quick Silver Stage 1 in it. I,ve been probably 24 years without a fuel issue in anything and only the newer 25 has a water separator on it. If on boat motors I find myself with gas thats over 6 months old i,ll simply pump it into trk. to be on safe side . Really that only occasionally happen s with 90 tank where its large. Maybe i,m lucky but system has worked flawlessly for myself once I discovered the right stabilizers.